A study to evaluate the influence of thread designs affecting stability of immediately loaded implant at maxillary posterior region

Abstract

Purpose: For successful osseointegration of an immediately loaded implant, the fundamental element is primary stability. Establishment of primary stability is influenced by combination of various factors one of them being implant geometry. Evaluation of primary stability and the factors influencing it is essential for successful treatment outcome. Methods: A total of 20 patients were divided into two groups. the implant placed in group I was with square thread designs (Ankylos® implant,DENTSPLY, Sirona) and group 2 was V shaped thread design MIS seven implant( MIS implant Ltd, Israel) in the pre molar-molar region. The stability was assessed with the aid of resonance frequency analysis (Osstell™, Integration Diagnostics, Sweden) at the time of implant placement, at three months and at six months. A repeated measure ANOVA and Bonferroni Pairwise comparison was used to compare the ISQ within each group. Results:There was a statistically significant difference in the stability at baseline to six months (p=0.006), from baseline to three months (p=0.006) and from three months to six months (p<0.001) in both the groups. Correlation could be found between implant geometry and stability observing improved stability in group 1 compared to group 2. Conclusion: The result from this material showed that the all implants were successfully osseointegrated with a mean ISQ of 80 and 71 at six months in group I and group II respectively. Implants with square threads showed a higher stability at baseline, at three months and at six months in comparison to the v shaped thread.